Just recently been getting wrong readings from my Garmin 500 Edge. But showing me speeds of over 200 km while i am riding. very inaccurate. what should i do to correct this? thanks

Just recently been getting wrong readings from my Garmin 500 Edge. But showing me speeds of over 200 km while i am riding. very inaccurate. what should i do to correct this? thanks


Problem has been only in recent times. I have 3 bikes on my Garmin. All 3 have a Speed/cadence sensor connected.


I use the magnet /sensor for measuring speed.
but recently the speeds are showing way to high and odd figures


what can i do to fix this problem?
thanks